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// Station · 25m ago

KTTD

Portland Troutdale Airport
CAT VFR
WIND CALM
VIS 10+ SM
CEILING CLR
T/Td 21.1°C / 12.8°C
ALTIM 30.00 inHg
ELEV 39 FT
45.5494°N / 122.4010°W
LOCATION · Portland, US
N
WIND
000°0 kt
KTTD · 39 FT
© OSM · CartoDB

// Current + 24h forecast · METAR loaded · TAF loading…

METRIC
NOW · 15Z
+6H
+12H
+18H
WIND
CALM
 
 
 
VIS
10+ SM
 
 
 
CEILING
CLR
 
 
 
LAYERS
 
 
 
T / Td
21 / 13
 
 
 
ALTIM
30.00"
 
 
 

// Interpretation

VFR with winds calm. Visibility better than 10 statute miles and no reported cloud layers. Would shift to MVFR if the ceiling drops to 3,000 ft or visibility below 5 SM.

Loading TAF forecast narrative…

SOURCES · NOAA Aviation Weather Center METAR (TAF loading…)

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// Raw observation METAR string + decoded

METAR KTTD 251553Z 00000KT 10SM CLR 21/13 A3000 RMK AO2 SLP157 T02110128

KTTD · day 25 at 15:53 UTC · winds calm · visibility 10+ SM · temp 21°C / dewpoint 13°C · altimeter 30.00" Hg · automated station w/ precipitation discriminator · sea-level pressure 1015.7 mb

// Runway analysis · computed from current METAR wind

Wind CALM
ALL USABLE · WINDS CALM
N
WIND
000°calm
HEADWIND CAUTION · HIGH XW AVOID · TAILWIND
ALL RUNWAYS · CALM WINDS 2 ends
07 HDG 070° CALM 5,399'
25 HDG 250° CALM 5,399'
Pattern altitude: 1,039 ft MSL (1,000 ft AGL). Verify pattern direction and altitude with the chart supplement before flying. // On calm winds (<3 kt), all runways are usable — favor the longest or whatever the pattern calls for.

// Density altitude · ISA +6°C

700FT
+661 FT ABOVE FIELD ELEV
// DA · LAST 24 HOURS loading…
FIELD ELEV39 FT OAT+21°C ISA DELTA+6°C PRESSURE ALT-43 FT
// Performance equivalent Operating here right now feels like operating at KHRI (Hermiston Municipal Airport, Hermiston, elev 644 ft) on a standard ISA day.
// Aircraft performance impact MINOR
TAKEOFF ROLL CLIMB RATE
Single-engine propC172, PA-28, Cherokee
+7%
-5%
Turbo / high-perf pistonSR22T, Bonanza, Mooney
+5%
-3%
Light jetCJ4, Phenom 300, M2
+3%
-2%

Approximate using ~10% perf loss / 1,000 ft DA for normally aspirated, scaled by powerplant type. Verify with your aircraft's POH for accurate numbers — especially above 5,000 ft DA where these rules of thumb diverge. Severity rating assumes a standard altimeter setting (29.92" Hg / 1013 hPa); a non-standard setting shifts the effective altitude by roughly 1,000 ft per 1" Hg of deviation.

// Cloud layers · clear · no layers reported

FT 0 5k 10k 15k 20k 25k FRZ LVL · 10,696 FT KTTD ELEV · 39 FT
// Reported layers (highest → lowest)
CLR
No reported cloud layers — clear sky from surface to reporting ceiling.
// Computed
CEILING HIGHEST LAYER TOTAL COVERAGEclear FREEZING LEVEL10,696 ft VFR MARGINunlimited

// Sun & Moon · times in Z · bar = local day (UTC-8)

13:23ZSUNRISE
20:13ZSOLAR NOON
03:02ZSUNSET
03:33ZCIVIL END
CURRENT16:18Z DAYLIGHT REMAINING10h 44m VFR NIGHT BEGINS03:33Z (11h 15m) DAY LENGTH13h 38m
Waxing Gibbous
ILLUMINATION94% MOONRISE23:26Z MOONSET13:05Z FULL MOON IN2 days

// Nearest reporting stations

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// Area map · 60 NM radius · CartoDB Dark Matter + aeronautical overlay

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